Safety buckle



Feb. 8, 1938. STRAUSS 2,107,878 I SAFETY BUCKLE Filed March 17, 1957 MyAme Y Patented Feb. s, 1938 2,107,878

2,107,878 SAFETY BUCKLE Siegmund Strauss, Vienna, Austria ApplicationMarch 17, 1937,. Serial No. 131,278 I In Austria April 4, 1935 I 7Claims (01. 24-178) My invention relates to buckles for straps and strip6' to 'pass it with clearance whereby said belts and has for its object;to provide a, buckle strip is slidableyin longitudinal direction andalso which automatically releases the end. of the swingable to. someextent. The .end of the strip strap, when the pull exerted. upon saidstrap 6' is rolled up to 'form an eye accommodating jex'ceedsacertainpredetermined-value. the pin '9 of a 'bail Hi. The latter servesto jMy safety-buckle may be used-in bindings for attach the .fixed endof the strap (not shown) skisJ-or' for other purposes "where it isdesired in the usual manner,.for instance on the roller that the strapconnection is automatically rell. 'I'he'bail Illhas two cams H, thepurpose leased if excessive force, is exerted upon the same. otwhichwill be described later. The other end Thus, for instance, inlskiing,bone-fractures or of the metal 'strip 6' forms the tongue 4 .of the 0other. casualties anddamages to the ski-binding buckle; A slotted platel5 rides on the strip 6 and may be'avoided. bears upon shouldersorextensions-S of the strip With these objects in view, I provide in ,my6. A strong pressure spring 8 is arranged besafety buckle two holdingelements for the per-- tween the plates 3 and I5 which'spring mayforated'strape. garest and a tongue adapted have :an initial tension. inthe normal position to pass through the perforations of the strap and ofthe buckle.

' normally overlying said rest. The two holding The perforated end l4 ofthe strap is buckled elements are movable against each other relain theusual manner, as shown in Fig. 2. If a "tive to the resilient force of aspring or the pull is exerted upon the strap, the frame I, 2, 3

like whereby the tongue is disengaged from said moves together with theend l4 relatively to the 20 rest and the strap is released, if the pullexerted other part, as shown in Fig. 3. During this upon the strapexceeds a certain predetermined movement, the spring 8 is compressed. Ifthe value. 7 v V pull exceeds a maximum, which may be pre- My inventionalso aims at resetting means determined at will by choosing a spring ofap- -35 in a safety buckle of this kind, which enable the propriatestrength and by varying the distance user to easily refasten the'strapin the buckle. a. in Fig. 1, i. e. the overlapping between the rest 'Myinvention further aims at providing a 2 and the tongue 4, the tongue 4slides oiT the safety-buckle of this kind which may be manurest 2,releases the end of the strap l4 and factured at low expense and whichmay be easily assumes a position on the opposite side of the assembled.and disassembled to interchange the rest 2, as shown in Fig. 4. 30

; spring and other parts of it. In order to be able to fasten the end ofthe Other features of my invention will appear strap I4 again, it isnecessary to reset the tongue ffrom the following detailed descriptionwith refto its normal position shown in Fig. 1. This erence to theaccompanying drawing, in which would be very diflicult against theaction of Fig.1 is a plan View or" an embodimentof the strong spring 8,because this spring has to be 35 safety buckle according to theinvention in its compressed to reset the tongue. The cams I 2 normalposition, serve to compress this spring without undue I Fig. 2 is a sideelevation of the buckle, also in efiort by cam action, if the bail I0 isrotated itsnormal position, I 0 for about 90 with respect to the frameI, 2, 3,

4: Fig. 3 is aside elevation of the buckle in the as shown in Fig. 5. 40position which it attains if the strap buckled In themodificationshown'in Fig. 6 the plate into it is subjected to a heavy pull, I5 issecured to the tongue by means of a pin Fig. 4 shows the buckle in thesame position l3, which is held in a hole in the strip 6 under as Fig. 3after the strap has been released, the action of the compressed spring8. The pin :5 Fig. 5 shows in a side elevation the manner l3 may beremoved and the buckle may be dis- Q in which the tongue is restored tonormal pomounted, for instance in order to interchange i I the spring 8and. thereby adjust the force of Fig; 6 represents in a planvicw amodification the pull necessary to release the safety buckle. of thesafety buckle with interchangeable spring. w I claim The frame of thebuckle is formed, as shown 1. A buckle comprising a frame, a restforming 50 by Figsto 6, by Side-pieces I, bridge rest part of saidframe, a tongue adapted to engage 2 and a plate 3. These parts maybepunched in a strap and to bear upon said rest, said tongue one Singlepiece from sheet al, he Plate 3 forming part of a strip passing withclearance being formed by bending h metal at a right through a slot in aplate of said frame opposite angle. The plate 3 has a slot allowing ametal to said rest, a retaining element on said tongue, 55

resilient means arranged between said frame and said retaining elementon said tongue and cam means rotatably attached to said strip outside ofsaid frame and adapted to compress said resilient means.

2. A buckle comprising a frame, a rest forming part of said frame, atongue adapted to engage a strap and to bear upon said rest, said tongueforming part of astrip passing with clearance through 'a slot ina plateof said frame opposite to said rest a retaining element on said tongue,resilient means arranged between said frame and said retaining elementon said tongue, an eye formed on the end of said strip outside of saidframe, a pin passing through andv rotatable within said eye and bearinga strap, and cams forming part of said loop and cooperating with theslotted plate of the frame to compress said resilient means.

3. A buckle comprising a frame, a rest forming part of said frame, atongue adaptedto engage a strap and to bear uponsaid rest, said tongue"forming part of a strip passing with clearance through a slot in aplate of said frame opposite to said rest, means on said strip outsideof said frame for attaching a strap, a second slotted plate riding onsaid strip within said frame, a removable cross pin securing said latterslotted plate to said strip, and a helical compression springsurrounding said strip and interposed between the slotted plate of saidframe and said second slotted plate, said spring'having an initialtension in the normal position of the buckle.

4. A'buckle comprising, a frame, a rest integral with said frame, atongue swingable and longitudinally displaceable in said frame, the freeend of said tongue normally bearing upon said rest, a fixed retainingelement on said tongue and resilient means interposed between said frameand said retaining element on said tongue to retain the latter in itsnormal position, said resilient means permitting withdrawal of saidtongue to a position free of said rest under a pull exceeding apredetermined maximum.

5. A buckle, as claimed in claim 4, wherein said resilient meansconsists of a helical compression spring having an initial tension inthe normal position of the buckle.

6. A buckle for connecting two strap ends, comprising, a frame, atransverse rest forming part of said frame, a tongue adapted to engageone of said, strap ends and normally bearing upon said rest, said tonguebeing swingable and longitudinally displaceable within said frame andhaving means to attach the second strap end to said tongue at alongitudinally fixed point thereof, a retaining element fixed on saidtongue, and resilient means interposed between said frame and saidretaining element on said tongue to retain the latter in its normalposition, said resilient means permitting withdrawal of said tongue to aposition free of said rest and disengagement of said first mentionedstrap end, when the pull exerted on said second strap end exceeds apredetermined maximum.

7. A buckle, as claimed in claim 4, in which said tongue consists of astrip passing with clearance through an opening in a plate of said frameopposite said rest.

SIEGMUND STRAUSS.

